Yes, here's the reason... it's the biggest day in retail sales all year long in the U.S. The sales are used to gauge how much $$ consumers are spending and where the economy is going.
And, not to leave the internet out of it...the Monday following is known as 'Cyber Monday' - which is the day when internet companies have their biggest sales. So, just in case you all are looking to shop on the internet, that's the day to look for deals. Hope this helps!